Client metrics digest for a company: one fortnight vs the one before.

The risk metrics cover four complete ISO weeks ending at end_week; the in-progress week is never included, since it always under-reads until reviewing catches up. Eligible uploads reviewed is reported by month instead -- see _client_metrics_month_spans for why those months end where the weeks do rather than at the generation date.

team_ids scopes the whole document. Every figure then covers those teams together, and from two teams up the document also carries a per-team drilldown of each of them -- summed from the same query rows as the totals, so the parts add up to the whole by construction.